IT201900010197A1 - HEATING EQUIPMENT - Google Patents

Description

Description of Industrial Invention Patent entitled:

"HEATING EQUIPMENT".

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a heating equipment, in particular an equipment that can be fed with pellets.

STATE OF THE PRIOR ART

Many heating appliances have been proposed that can be fed with wood or pellets or even capable of operating alternately with both of these fuels.

Often these devices comprise a heat exchanger designed to allow the heat exchange between the air to be heated and the combustion fumes.

However, most of the existing equipments do not guarantee a satisfactory heat exchange, if not in the face of complex or expensive measures.

With particular reference to storage stoves, they are often no longer up to standard with regard to emissions and there is also the need to renew the worn out hearth.

Moreover, they are fueled with wood, which entails limits in terms of loading frequency and control electronics.

AIMS OF THE INVENTION

An object of the present invention is to provide a new heating equipment, in particular an equipment that can be fed with pellets.

Another purpose of the present invention is to provide an apparatus as indicated above which guarantees a high heat exchange between the air to be heated and the combustion fumes.

Another object of the present invention is to provide a new apparatus which can be manufactured in a simple and fast way starting from a storage stove, for the conversion of the latter from wood to pellets and for the conversion from heat transmission to environment by irradiation in heating appliances with forced ventilation heat transmission or heating through forced ventilation of the heat accumulation.

Another purpose of the present invention is to provide equipment that can be easily maintained.

Another purpose of the present invention is to provide equipment equipped with an effective system for channeling the heat or the air heated in it.

According to an aspect of the invention, an apparatus according to claim 1 is provided.

The dependent claims refer to preferred and advantageous embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the invention will be more evident from the description of an example of realization of an apparatus, illustrated by way of example in the accompanying drawings in which:

- Figures 1 and 2 are perspective views slightly from above and from respective sides of an apparatus according to the present invention;

- Figures 3 to 16 are sectional views or with parts removed from the equipment in Figure 1.

In the accompanying drawings, identical parts or components are indicated by the same reference numbers.

EXAMPLES OF REALIZATION OF THE INVENTION

With reference to the attached figures, a heating apparatus 1 for environments or premises, such as residential or office rooms according to the present invention, has been illustrated, presenting a frame 2 delimiting a positioning and combustion chamber or PCC combustion chamber of a fuel.

The frame 2 includes a main part 3 as well as a door 4 constrained, for example hinged to the main part 3 and movable with respect to the latter between an open position and a closed position of an access opening to the combustion chamber PCC. The access opening is preferably at the front of the equipment defined by leaf 4.

The door 4 can be provided with double glazing or ceramic glass 4a as well as with a counter-door 4b for aesthetic purposes, for example always in ceramic glass.

The apparatus 1 further comprises or defines a primary air transmission circuit 5 to be heated and conveyed to an environment external to the heating apparatus, such as a room in a house or an office, as well as a conveyance circuit 6 for smoke fumes. combustion generated in the PCC combustion chamber following the combustion of a fuel in the presence of combustion air.

The transmission circuit 5 and the conveying circuit 6 are clearly defined or delimited by the frame 2 and mainly or above all by the respective main part 3.

As regards in particular the combustion chamber PCC, it is delimited by a bottom or base wall 3a, by the door 4 as well as by a curved vertical wall or by several vertical walls suitably inclined and constrained to each other 3b, 3c, 3d, which extends / extend upwards starting from the edges, for example lateral and rear of the base wall 3a and which is / are tightly bonded with the latter. If more vertical walls are provided, they can include two sides 3b and 3c as well as a 3d rear wall which is distal from the leaf 4.

The walls 3a, 3b, 3c and 3d are preferably internal components of the main part 3 of the frame 2.

The transmission circuit 5 and the conveying circuit 6 are at least for part of their extension in a heat exchange ratio with each other, so that the air conveyed in the transmission circuit 5 is heated by the combustion fumes in the conveying circuit 6.

The expression in heat exchange ratio means that the air within the transmission circuit 5 is in heat exchange through the interposition of a wall, preferably metal of the frame, with the combustion fumes conveyed into the conveyor circuit 6.

Naturally, the transmission circuit 5 or better the air transmission channel defined by it is fluid-tight, also by means of suitable gaskets not described in detail, with respect to the conveying circuit 6 or better the flue gas conveying channel defined by it. , so the ambient air to be heated is not mixed with the combustion fumes, but is only in heat exchange with them.

More specifically, the transmission circuit 5 comprises at least a first section 5a and at least a second section 5b, while the conveying circuit 6 comprises at least a first portion 6a in heat exchange relationship with the first section 5a as well as at least a second portion 6b in heat exchange ratio with the second section 5b.

Preferably, the second section 5b is a section of the transmission circuit 5 following or downstream of the first section 5a. Even more preferably, the second section 5b is a section adjacent and subsequent to the first section 5a, so that the outlet end of the first section 5a corresponds to the inlet end of the second section 5b, so that the outgoing air from the first section 5a you enter the second section 5b.

Clearly, the transmission circuit 5 can also have a connecting section between the first 5a and the second section 5b as well as other sections before or after the latter.

Advantageously, the second portion 6b is a portion of the conveying circuit 6 following or downstream of the first portion 6a. Even more preferably, the second portion 6b is a portion adjacent and subsequent to the first portion 6a, so that the outlet end of the first portion corresponds to the inlet end of the second portion 5b, so that the fumes leaving the first portion 6a enter the second portion 5b.

Clearly, the conveying circuit 6 may also have a connecting portion between the first 6a and the second 6b portion as well as other portions before or after the latter.

Also in this case, the expression in heat exchange ratio means that the air conveyed within the first section 5a is in heat exchange through the interposition of a wall, preferably metal of the frame 2, with the combustion fumes conveyed within the first portion 6a, while the air conveyed within the second portion 5b is in heat exchange through the interposition of a wall, preferably metal of the frame, with the combustion fumes conveyed within the second portion 6b. Preferably, the first portion 5a has at least one wall in common with the first portion 6a and the second portion 5b has at least one wall in common with the second portion 6b.

The first section 5a and the first portion 6a are in a heat exchange ratio for all or part, at least 50%, 60%, 70% or 80% of their length and the same applies to the second section 5b and the second portion 6b .

Moreover, in accordance with the non-limiting embodiment illustrated in the figures, the first section 5a and the first portion 6a extend along a first direction A-A, while the second section 5b and the second portion 6b extend or have a main direction along a second direction B-B inclined, if desired orthogonal, with respect to the first direction A-A of main extension of the first section 5a and of the first portion 6a.

Preferably, the first portion 5a and the first portion 6a are parallel to each other, and furthermore the second portion 5b and the second portion 6b are parallel to each other.

If desired, the first section 5a and the first portion 6a are vertical or inclined with respect to the horizontal, while the second section 5b and the second portion 6b are horizontal or substantially horizontal or vice versa.

The expression "substantially horizontal" means that the second section 5b and the second portion 6b are preferably inclined with respect to the horizontal by an angle between 0 ° and 30 °.

Clearly, different configurations could also be provided, but with an angle between the first 5a and the second 5b stretched for example between 45 ° and 135 °, if desired between 60 ° and 120 ° or between 80 ° and 100 ° and / or with a angle between the first 6a and the second 6b portion for example between 45 ° and 135 °, if desired between 60 ° and 120 ° or between 80 ° and 100 °.

The first 5a and the second 5b sections are not terminal sections of a respective curved section, also because a curved section would not guarantee the desired turbulence. Moreover, the first 5a and the second 5b sections are preferably straight.

Similarly, the first 6a and the second 6b portions are not terminal portions of a respective curved segment, also because a curved segment would not guarantee the desired turbulence. Moreover, the first 5a and the second 5b portions are preferably rectilinear.

The terms "vertical", "horizontal" and "inclined" must clearly refer to the main development of the ducts, sections or portions, where the main development is to be understood as the main length or dimension between a respective air or flue inlet end and a respective air or fumes outlet end.

Alternatively or in addition to the condition indicated above, the relative arrangement between the first section 5a and the first portion 6a is different from that between the second section 5b and the second portion 6b, so that the primary air in the passage from the first 5a to the second section 5b and the combustion fumes in the passage from the first 6a to the second 6b portion undergo a variation not only or not necessarily directional, for example from vertical to horizontal or vice versa, but also in relation to the shape and / or dimensions of the passage section of the respective circuit 5, 6 , being able to pass, for example, from square, rectangular or circular to annular with a circular, square, rectangular or other shape base or vice versa.

In this regard:

- the first portion 6a can be internal to the first section 5a and the second section 5b internal or in any case not enveloping or not including, for example alongside the second portion 6b, or

- the first portion 5a can be internal to the first portion 6a and the second portion 6b internal or in any case not enveloping or not including, for example alongside the second section 5b, or

- the second portion 6b can be internal to the second portion 5b and the first portion 5a not internal and not enveloping or not including, for example alongside the first portion 6a, or

- the second section 5b can be internal to the second portion 6b and the first section 5a not internal and not enveloping or not including, for example alongside the first portion 6a.

Thanks to the solution indicated above, an outflow of the air from the first 5a to the second 5b section and of the fumes from the first 6a to the second 6b portion is obtained such as to implement the heat exchange between primary air and combustion fumes, since a motion is imparted turbulent to air and fumes.

The best heat exchange is naturally obtained when both the conditions described above (inclined sections and portions and sections and portions alternately one inside the other or as now indicated) are present.

Preferably, the transmission circuit 5 of air to be heated and conveyed as well as the conveying circuit 6 of combustion fumes develop on one or both sides 9, 10 of the equipment.

If desired, the transmission circuit 5 includes at least a first section 5a and at least a second section 5b on a first side 9 of the equipment as well as at least a first section 5a and at least a second section 5b on a second side 10 of the equipment.

More particularly, according to the embodiment illustrated in the figures, the first section 5a comprises a first duct 5c which extends externally and preferably parallel to a respective side wall 3b, 3c delimiting the combustion chamber PCC and in a vertical direction or inclined with respect to the horizontal, while the second section 5b comprises a second duct 5d, which extends from the bottom of the first section 5a in a horizontal direction or in any case inclined with respect to the horizontal to a lesser extent than the first section.

Preferably, the second section 5d extends to a lower level than the bottom wall or base 3a.

The first 5c and / or the second 5d duct can / can have a square, rectangular, circular cross section or with other geometry.

The conveying circuit 6 can instead comprise in this case at least a first portion 6a and at least a second portion 6b on a first side 9 of the apparatus as well as at least a first portion 6a and at least a second portion 6b on a second side 10 of the apparatus .

Clearly in this case, a first section 5a on a first side 9 would be in heat exchange with a first portion 6a on this side 9 and at least a second section 5b on the first side 9 would be in heat exchange with a second portion 6b on this side and the same applies to the first 5a and second 5b sections and first 6a and second 6b portions on the second side 10.

Still according to the embodiment illustrated in the figures, the or a first portion 6a comprises a third duct 6c which extends externally and parallel to a respective side wall 3b, 3c of the combustion chamber PCC and in a vertical or inclined direction with respect to the horizontal, while the respective second portion 6b comprises a fourth duct 6d, which extends from the bottom of the first portion 6a in a horizontal direction or in any case inclined to a lesser extent than the first portion with respect to the horizontal.

Preferably, the or each second portion 6b extends to a lower level than the bottom wall or base 3a.

Advantageously, the third duct 6c of one or each first portion 6a is mounted externally to a respective side wall 3b, 3c so that the latter actually constitutes a wall of the third duct 6c and in this side wall 3b, 3c a ' upper through opening UO designed to put the combustion chamber PCC or better the top of the same in fluid communication with the channel defined by the third duct 6c, so that the combustion fumes can pass from the combustion chamber PCC or better from the top of the same into the third duct 6c.

The lower end, in use, 6e of the third duct 6c is mounted, for example bolted and leading into a lower opening LO delimited by a wall or section of the upper wall 6d1 of the fourth duct 6d.

The third duct 6c and / or the fourth duct 6d can / can have a square, rectangular, circular cross section or with other geometry.

Instead, as regards in detail the first 5c and the second duct 5d, the first duct 5c comprises an external wall 5c1, for example substantially parallel to a respective side wall 3b, 3c, an internal or proximal wall to the combustion chamber PCC corresponding to the external wall of a respective third duct 6c and to the side wall section 3b, 3c not enveloped by the latter, a front wall 5c2 and a rear wall 5c3. The first duct 5c, according to the embodiment example illustrated in the figures, is therefore in heat exchange with the combustion chamber PCC with the interposition of a respective side wall 3b, 3c.

Relatively then to the bottom or lower part of the first duct 5c, this ends in front of the fourth duct 6d, since the latter does not extend as far as the front wall 5c2, so that a space FS remains defined at the front end of the fourth duct 6d, starting from which the external air to be heated can enter the second duct 5d. With regard to this aspect, the front end of the fourth duct 6a may also have a front opening 6a1 at which the second duct 5d flows and is connected to the first 5c.

The second duct 5d, on the other hand, is arranged or unwinds within a tubular or box-shaped body defining the fourth duct 6d.

Clearly, a different configuration could also be provided, in which the fourth duct 6d extends up to the front wall 5c2, and there is then provided an elbow or not elbow connection section between the first or second duct or also other configurations such as to guarantee the passage of air between the first and second ducts and combustion fumes between the third and fourth ducts, without, of course, mixing between the air to be heated and the combustion fumes. In this regard, special gaskets not illustrated in detail can also be provided.

Moreover, as an alternative to the variant illustrated in the figures, there could be a first section of the transmission circuit inside a first portion of the conveying circuit and a second section outside the first portion or one of the configurations indicated above or in any case such as to impart to the air. external in the passage from the first section to the second section and / or to the fumes in the passage from the first to the second section a variation that is not only or not necessarily directional, from vertical to horizontal or vice versa, and such as to determine a turbulent motion due to a variation of the shape and / or dimensions of the passage section, being able to pass for example from square, rectangular or circular of the first section or of the first portion to annular with a circular, square, rectangular or other base of the second section or of the second portion or vice versa.

The configuration of the sections of the transmission circuit and portions of the conveying circuit could be the same on both sides of the equipment or even different between the two sides 9, 10.

If desired, the transmission circuit 5 has at least one air intake opening 5f at the top on the front of the apparatus 1, if desired covered by a grille or similar component 11 and at least one discharge opening 5g at the bottom in correspondence with the rear of the apparatus 1, each discharge opening 5g being able to be delimited by one end of a second section 5b.

Clearly, the intake opening 5f would blur or be in fluid communication with the or each first duct 5c, so that the air from the outside could be conveyed into the latter.

As indicated above, the conveying circuit 6 of combustion fumes can instead develop from a top area of the PCC combustion chamber towards the bottom of the equipment and then towards the rear of the latter. More specifically, the conveying circuit 6 of combustion fumes can extend from the sides of the combustion chamber PCC towards the bottom of the equipment and then towards the rear of the latter.

Combustion fumes discharge ducts can then be provided, for example upwards, then to the chimney.

According to the non-limiting embodiment illustrated in the figures, there would be a downward equilibrium heat exchange between primary air and combustion fumes, but of course a reverse flow could also be provided, from the bottom to the top of the primary air and / or combustion fumes so as to have a counter-current or equi-current heat exchange upwards between primary air and combustion fumes.

The apparatus can then comprise at least one brazier 12 protruding into the combustion chamber PCC as well as an ignition element 13 for triggering the combustion of a fuel, such as pellets in or on the brazier 12. Appropriate means for actuating the ignition element 13, such as a spark plug 13a, cables 13b or other suitable components.

The equipment can also include a delivery line 14 of combustion air in the combustion chamber PCC, for example in the brazier 12.

The brazier 12 can have a tubular body, if desired mounted in the bottom or base wall 3a.

The tubular body can include an external tubular or cylindrical wall 12a and an internal tubular or cylindrical wall 12b defining between them a manifold zone CZ served by the delivery line 14 of air to be conveyed (after passing through the zone CZ) towards a recessed portion or lower PCC1 of the combustion chamber PCC defined by the brazier 12 or better by the internal tubular wall 12b, after passing through first holes 12c delimited in the internal tubular wall 12b and second holes 12e delimited in a transverse terminal wall 12d mounted on one end, in the lower use of the inner tubular wall 12b is in fact designed to close the latter at the bottom except for any holes 12c.

The inner tubular wall 12b can have a tapered configuration from top to bottom or towards a respective end wall 12d, or for example have a truncated cone-shaped upper section 12b1 with a decreasing section from top to bottom and, if desired, also a lower section, for example straight. 12b2, in which the dispensing line 14 or the dispensing end of a portion thereof can be inserted. The first holes 12c can for example be delimited in the lower straight section 12b for example at an upper end of the same.

The brazier 12 can also include a deflector 12f mounted on the upper edge or top of the internal tubular wall 12b, which deflector 12f can extend only for part of this edge, in particular for part of the front portion or facing the door 4 of the same. .

The delivery line 14 can be provided with a connecting duct 15 engaged in the external tubular or cylindrical wall 12a and leading into the manifold zone CZ.

The delivery line 14 can then be provided with a terminal duct 16 mounted within the connection duct 15 and in which a trigger element is housed, if desired electric or a spark plug 13. This electric element could comprise for example a resistance, if desired inserted inside a sealed cylindrical metal body, so that the Joule effect created as a result of the electrical supply of the resistor determines an increase in the temperature of the cylindrical body until it becomes incandescent, thus heating the air that touches it, which then enters inside the brazier 12 starting the combustion of the fuel, for example wood pellets.

The terminal duct 16 can have a distal end 16a from the brazier 12 delimiting one or more through holes or slots 17 or open and a proximal end 16b open or with holes and mounted or engaged in the external tubular wall 12a and internal 12b so as to open in the recessed or lower portion PCC1, wanting immediately above the end wall 12d.

With such a structure, the air delivered through the delivery line 14 is conveyed into the connecting duct 15 thus passing partly through the holes 12c, 12e of the inner tubular wall 12b and, if desired, of the end wall 12d and also into the end duct 16 thus reaching the recessed or lower portion PCC1 passing in part around the trigger element 13. Clearly, all or only part of these passages could be provided for the combustion air.

The delivery line 14 may also have or alternatively to what has now been described a branch 18 for the transmission of combustion air in correspondence with leaf 4.

The branch 18 can comprise, among others, one or more initial ducts 18a, if desired horizontal and one or more vertical or non-horizontal ducts 18b which extend on one or both sides of the appliance, if desired around the door 4 and which are in fluid communication or designed to convey combustion air towards a first transverse duct 18c extending on the front of the apparatus or better in correspondence with the portion of the frame 2 defining the front engagement area of the wing 4. The transverse duct 18c is preferably in a position higher than the base wall 3a.

A second transverse duct 18d can be mounted or connected close to or in front of the first transverse duct 18c and these ducts are in fluid communication with each other by means of respective holes or openings 18e.

In the second transverse duct 18d there are then delimited one or more feeding holes 18f of combustion air inside the combustion chamber PCC, in particular starting from an upper frontal area of the same.

Clearly, the branch 18 of the delivery line 14 can also be structured in a different way, if desired without the first or second transverse duct.

The delivery line 14 is advantageously but not necessarily insulated or fluid-tight with respect to the surrounding or installation environment of the apparatus as well as with respect to the transmission circuit 5. In this case, the apparatus also provides one or more suction pipes designed to put in fluid communication a zone different from that of installation of the apparatus 1 with the delivery line 14. This zone could be, for example, an zone external to a slave house or in which the apparatus is installed.

Preferably, the equipment also comprises an automatic fuel loader 20, for example pellets, in the combustion chamber PCC. Said automatic loader 20 can comprise an auger 21 suitably operated by means of a respective gearmotor 21a, which is mounted in a first tube 22, if desired inclined with respect to the vertical and ascending towards the combustion chamber and therefore a second tube 23, if desired descending in approaching the combustion chamber PCC and flowing into the latter, for example in a rear area of the same defined by the 3d wall.

The automatic loader 20 or rather a respective area close to the auger 21 can be loaded manually directly or after introducing the combustion into an upper tank 24 or mounted on top of the apparatus from which the fuel is dropped or slipped, if desired by opening / closing of a special valve, towards the automatic loader 20 or towards the respective auger 21.

The tank 24, if provided, can be mounted on the top of the apparatus 1 and can be loaded starting from an upper hatch and / or from a closed front hatch or, better still, can be opened / closed by means of a respective door 25, 26. Clearly, the tank 24 could also be provided on the bottom of the apparatus.

Advantageously, the apparatus 1 comprises at least a first fan component 28a as well as one or more suction ducts designed to put the first fan component 28a in fluid communication with the transmission circuit 5 and one or more delivery ducts designed to distribute the primary air in one or more rooms to be heated.

Preferably, the first fan component 28a is mounted outside the frame 2, although it could also be mounted within the frame. If desired, the first fan component 28a is mounted in a separate room by means of a wall from that of the installation of the equipment.

Moreover, this component 28a can be connected both in the lower part of the equipment and in the rear part, this facilitating installation and allowing the creation of an appropriate channel to extract the hot air from the equipment and bring it to the rooms to be heated.

Of course, the first fan component 28a can also be mounted so as to push and not suck the primary air into the transmission circuit.

The equipment can then include a second fan component 28b designed to suck the combustion fumes along the conveyor circuit 6.

The second fan component 28b can be arranged in different points of the equipment, for example in the frame between the front and the back of the same or even outside the equipment.

The aspiration of the combustion fumes by the second fan component 28b can result in a consequent aspiration within the PCC combustion chamber of the comburent air along the delivery line 14.

Naturally, the second fan component 28b could also be mounted in such a way as to push and not suck the combustion fumes into the conveying circuit.

Alternatively, a natural draft can also be provided for the combustion fumes.

Furthermore, as regards the combustion air, the respective delivery line could be enslaved by a respective fan.

If desired, the equipment 1 also includes a base 29 on which the frame 2 can be removably mounted.

The base 29 can comprise a guide or a pair of parallel guides 30 in which sliding crosspieces 31 or similar of the frame are mounted, which crosspieces 31 are parallel to each other and mounted below the frame 2, for example each in correspondence with a side equipment 1.

Thanks to this expedient, it is possible to release the frame 2 from the base 29 for maintenance.

The base 29 can then comprise one or more uprights 32, if desired bearing feet 33 at the bottom, for example adjustable in height, as well as stiffening crosspieces 34 each extending between two respective uprights 32 and connected to them, for example by means of screws or bolts. .

The uprights 32 support the guide or guides 30 above, to which they are connected, if desired by means of screws or bolts.

The uprights 32 may however comprise a telescopic structure which can be adjusted in length.

The equipment can then comprise an electronic control module 36 of the various components, for example fans, sensors, the automatic loader, valves, etc. The electronic control module 36 is preferably mounted outside the frame 2. If desired, the electronic control module 36 is mounted in a room separated by a wall from that of the installation of the equipment.

The electronic control module 36 can be controlled by remote control 37, by another device or by means of a respective display.

Advantageously, the equipment also includes an air passage circuit 38 designed to exchange heat in a convective manner with the combustion chamber.

This circuit 38 may for example have a first part or interspace 38a extending behind the combustion chamber PCC, therefore delimited by the rear wall 3d together with an internal wall 39 which is distal from the leaf 4. An inlet opening 10 is then provided. in the circuit 38 and more particularly in the respective first part 38a, wanting an inlet opening 10 delimited and accessible starting from the bottom of the apparatus. The first part 38a is therefore in heat exchange with the combustion chamber PCC by means of the rear wall 3d.

The passage circuit 38 also includes a second part including one or more convective ducts 38b which branch off through the combustion chamber PCC and at the top thereof, between the first part 38a and the front of the appliance immediately behind the door 4. The convective ducts 38b can have an anterior or proximal end to the wing 4 at a higher level than the relative rear end or distal from the wing 4. The convective ducts 38b are therefore immersed in or extend through the combustion chamber PCC.

A third part or plenum 38c can then be provided which develops starting from the first part 38a above the combustion chamber PCC and flows outside the apparatus or in correspondence with the discharge openings DO in the first or first sections 5a of the transmission 5, if desired on top of the same / s.

Thanks to the passage circuit 38, in the event that the first fan component 28a was stopped or did not work, there would still be a convective heat exchange, which would allow heat to be expelled, for example as long as the possible electronic control module does not should report the malfunction so as to block the equipment if a time exceeding a threshold value has elapsed. There would therefore be an intermediate phase between a phase of correct operation and a phase of interruption of operation or in any case an operation phase different from that with the fan 28a on.

Thanks to an apparatus according to the present invention, as will be understood, it is possible to increase the efficiency of the heat exchange between the air to be heated and the combustion fumes compared to current solutions, thanks in particular to the expedient, described above in greater detail, according to in which the transmission circuit and the conveying circuit have several sections and portions in heat exchange which are inclined to each other and / or because an alternation of air and fumes is provided between respectively internal and external ducts or in any case as indicated above.

As a function of this, turbulence is obtained in the air and / or in the combustion fumes which significantly increases the efficiency of the heat exchange.

In particular, the simultaneous presence of the inclinations between the sections and portions of the circuits 5, 6 and the fact that these circuits pass one inside the other alternately determines an excellent heat exchange between the air to be heated or primary air and combustion fumes. .

In this regard, preferably, a fourth duct 6d is provided, for example horizontal in the lower part of the apparatus in heat exchange with a second duct 5d, for example equally horizontal.

Moreover, an apparatus according to the present invention, depending on the respective structure, can be provided for converting existing storage stoves, in particular those no longer usable due to anti-pollution regulations, from a wood operation to a pellet operation. which involves less frequent loading and the possibility of using more advanced electronics.

Again by means of an apparatus according to the present invention, it is possible to recover installed storage stoves by transforming them from heat storage appliances for heating with heat transfer to the environment by radiation into heating appliances with forced ventilation heat transmission or heating by means of the forced ventilation of the heat accumulation.

Furthermore, in an apparatus according to the present invention it is possible (but clearly not necessary) to provide modules that are mechanically or physically independent or separable from each other, for example each with reduced dimensions compared to the previous solutions, in particular a hearth module (including the frame 2 delimiting the combustion chamber PCC as well as the transmission circuit 5 and the conveyor circuit 6), a module for the base 29, a module for the first fan component 28a and an electronic control module 36 of the equipment components . Thanks to this it is possible to replace or maintain the individual modules separately, as well as arrange them in distant or separate positions even by means of a wall, thus improving safety or even soundproofing.

In this regard, clearly, with the expression "mechanically or physically independent or separable from each other", we mean that each module can be managed, maintained or replaced, as a single piece independently from the others, although clearly, during use of the equipment, the various modules are mechanically and / or electronically connected, since the base 29 supports the frame 2, the first fan component 28a conveys the primary air into the transmission circuit 5 and the electronic control module 36 manages the operation of the equipment.

The presence of guides guarantees the possibility of properly maintaining the equipment.

Moreover, if the delivery line 14 is isolated or fluid-tight with respect to the surrounding environment or the installation of the equipment, then it is possible to guarantee the entry of combustion air directly from the outside of a house served by the equipment, thus avoiding to take this air from the domestic environment.

Changes and variants of the invention are possible within the scope of protection defined by the claims.

Claims (25)

CLAIMS 1. Heating equipment for rooms or rooms having a frame (2) delimiting a positioning and combustion chamber or combustion chamber (PCC) of a fuel, said frame (2) including a main part (3) as well as a door (4) constrained to said main part (3) and movable with respect to the latter between an open position and a closed position of said combustion chamber (PCC), said apparatus further comprising an air transmission circuit (5) primary to be heated and conveyed to an environment external to said heating apparatus as well as a conveying circuit (6) of combustion fumes generated in said combustion chamber (PCC), said transmission circuit (5) and said conveying circuit ( 6) being at least for part of their extension in a relationship of heat exchange between them, so that the air conveyed in said transmission circuit (5) is heated by said combustion fumes in said conveying circuit (6), said transmission circuit (5) comprising at least a first portion (5a) and at least a second portion (5b), while said conveying circuit (6) comprises at least a first portion (6a) in heat exchange ratio with said at least one first portion (5a) as well as at least a second portion (6b) in heat exchange relationship with said at least one second portion (5b), in which said at least a first portion (5a) and said at least a first portion (6a) extend along a first direction (A-A), while said at least a second portion (5b) and said at least a second portion (6b) extend or present a direction along a second direction (B-B) inclined with respect to the first direction (A-A) of main extension of said at least one first portion (5a) and of said at least one first portion (6a), and / or the relative arrangement between said at least one first section (5a) and said at least one first portion (6a) is different from that between said at least one second section (5b) and said at least one second portion (6b), so that the primary air in the passage from the first (5a) to second (5b) section and the combustion fumes in the passage from the first (6a) to the second (6b) portion undergo a variation not only or not necessarily directional, but also in relation to the shape and / or dimensions of the passage section of the respective circuit (5 , 6). 2. Apparatus according to claim 1, wherein said at least one first portion (5a) is inclined by an angle between 45 ° and 135 ° with respect to said at least one second portion (5b), while said at least one first portion (6a) is inclined by an angle between 45 ° and 135 ° with respect to said at least one second portion (6b). 3. Apparatus according to claim 1 or 2, wherein said at least one first portion (5a) and said at least one first portion (6a) are vertical or inclined with respect to the horizontal, while said at least one first portion (5b) and said first portion (6b) are substantially horizontal or vice versa. 4. Apparatus according to claim 1, 2 or 3, wherein - said at least one first portion (6a) is internal to said at least one first section (5a) and said at least one second section (5b) is internal or in any case not enveloping or not including said at least one second portion (6b), or - said at least a first portion (5a) is internal to the first portion (6a) and the second portion (6b) is internal or in any case not enveloping or not including said at least a second portion (5b), or - said at least one second portion (6b) is internal to said at least one second portion (5b) and said at least one first portion (5a) is not internal and non-enveloping or not including said at least one first portion (6a), or - said at least a second portion (5b) is internal to said at least one second portion (6b) and said at least one first portion (5a) is not internal and does not envelop or does not include said at least one first portion (6a). 5. Apparatus according to any one of the preceding claims, wherein said transmission circuit (5) and said conveying circuit (6) extend on both sides (9, 10) of said apparatus, and in which said transmission circuit ( 5) comprises at least a first section (5a) and at least a second section (5b) on a first side (9) of the apparatus as well as at least a first section (5a) and at least a second section (5b) on a second side (10 ) of the apparatus, while said conveying circuit (6) comprises at least a first portion (6a) and at least a second portion (6b) on a first side (9) of the apparatus as well as at least a first portion (6a) and at least one second portion (6b) on a second side (10) of the apparatus. 6. Apparatus according to any one of the preceding claims, wherein said transmission circuit (5) has at least one air intake opening (5f) at the top on the front of the apparatus and at least one exhaust opening (5g) at the bottom at the rear of the appliance. 7. Apparatus according to any one of the preceding claims, wherein said combustion fumes conveying circuit (6) develops starting from a top area of said combustion chamber (PCC) towards the bottom of said apparatus and therefore towards the back of the latter. 8. Apparatus according to any one of the preceding claims, comprising at least one brazier (12) protruding into the combustion chamber (PCC) as well as an ignition element (13) for the combustion of a fuel in or on said brazier (12). 9. Apparatus according to claim 6, comprising a supply line (14) of combustion air in said at least one brazier (12). 10. Apparatus according to claim 9, wherein said brazier (12) comprises a tubular body including an external tubular or cylindrical wall (12a) and an internal tubular or cylindrical wall (12b) defining between them a collector zone (CZ) enslaved from said delivery line (14) of air to be conveyed towards a hollowed or lower portion (PCC1) of the combustion chamber (PCC) defined by the brazier (12). 11. Apparatus according to claim 10, wherein said delivery line (14) is provided with a connecting duct (15) engaged in the external tubular or cylindrical wall (12a) and leading into the manifold zone (CZ). 12. Apparatus according to claim 11, wherein said delivery line (14) comprises a terminal conduit (16) mounted within the connection conduit (15), said initiation element (13) being housed in said terminal conduit (16) . 13. Apparatus according to claim 9, 10, 11 or 12, in which said delivery line (14) comprises a branch (18) for transmitting the combustion air at the door (4). 14. Apparatus according to any one of the preceding claims, comprising an automatic loader (20) of fuel, for example pellets, in said combustion chamber (PCC). 15. Apparatus according to claim 14, comprising a tank of said upper fuel (24) from which the fuel can be made to fall or slide towards the automatic loader (20) or towards a respective auger (21), said tank (24) being loadable from an upper and / or front hatch closed by means of a respective door (25, 26). 16. Apparatus according to any one of the preceding claims, comprising a base (29) on which said frame (2) can be removably mounted. 17. Apparatus according to claim 16, wherein said base (29) comprises a guide or a pair of parallel guides (30) in which cross-members (31) of said frame (2) are slidingly mounted. 18. Apparatus according to any one of the preceding claims, comprising an air passage circuit (38) designed to exchange heat in a convective manner with said combustion chamber (PCC). 19. Apparatus according to claim 18, wherein said passage circuit (38) has a first part (38a) extending behind the combustion chamber (PCC) and an inlet opening (10) is then provided in the circuit (38) and more particularly in the respective first part (38a), said passage circuit (38) also including a second part having one or more convective ducts (38b) which branch off through the combustion chamber (PCC) between the first part (38a ) and the front of the appliance immediately behind the door (4). 20. Apparatus according to claim 19, wherein said passage circuit (38) comprises a third part (38c) which extends from the first part 38a above the combustion chamber (PCC) and flows into the transmission circuit (5) . 21. Apparatus according to any one of the preceding claims, comprising at least a first fan component (28a) as well as one or more suction ducts designed to put said at least one first fan component (28a) in fluid communication with said transmission circuit (5 ) and one or more delivery ducts designed to distribute said primary air in one or more rooms to be heated. 22. Equipment according to claim 21, wherein said at least one first fan component (28a) is mounted outside the frame (2), wanting in a room separated by a wall from that of installation of the equipment. 23. Apparatus according to any one of the preceding claims, comprising a second fan component (28b) designed to suck the combustion fumes along said conveyor circuit (6). 24. Apparatus according to claims 9 and 23, in which the aspiration of the combustion fumes by the second fan component (28b) causes a consequent aspiration in the combustion chamber (PCC) of the comburent air along the delivery line (14 ). 25. Apparatus according to any one of the preceding claims when dependent on claims 16 and 21, comprising: - a hearth module including said frame (2) delimiting said combustion chamber (PCC) as well as said transmission circuit (5) and said conveying circuit (6), - a module for said base (29), - a module for said first fan component (28a), e - an electronic control module (36) of the equipment components, said modules being mechanically or physically independent or separable from each other, so that it is possible to replace or maintain the individual modules separately, as well as to arrange them in distant positions or even separated by a wall, thus improving safety or even soundproofing.